Webmath.com: Doing math with fractionsHere's how to convert 3.875 to a fraction...

There is not much that can be done to figure out how to write 3.875 as a fraction, except to literally use what the decimal portion of your number, the .875, means.

Since there are 3 digits in 875, the very last digit is the "1000th" decimal place.

So we can just say that .875 is the same as 875/1000.

The fraction is not reduced to lowest terms. We can reduce this fraction to lowest
terms by dividing both the numerator and denominator by 125.

Why divide by 125? 125 is the Greatest Common Divisor (GCD)
or Greatest Common Factor (GCF) of the numbers 875 and 1000.
So, this fraction reduced to lowest terms is

So your final answer is: 3.875 can be written as the fraction